Air-tight cistern.



B. L. MILLS.

AIE TIGHT CISTBRN. APPLIOATION FILED AUG. 26. 1908.

Patented June 29, 1909.

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NTED STATES PATENT OFFCE.

BERT L. MILLS, OF HASTINGS, NEBRASKA, ASSIGNOR OF ONE-HALF TO A. B. CRAWFORD, OF HASTINGS, NEBRASKA.

AIR-TIGHT Application led August 26,

To all wlw/m tt may concern.'

Be it known that l, BERT L. MrLLs, a citizen of the United States, residing at Hastings, in the county ol Adams and State of Nebraska, have invented a new and useful Air-Tight Cistern, Of which the following is a specification.

This invention relates to an air tight cistern intO which Water and air under pressure is to be forced, and the water is to be expelled and conveyed to place of use by air pressure.

The Object Of this invention is to construct a cistern of this kind mainly of concrete, with a retaining dome of metal plates, and provided with means for holding said dome in position.

The invention consists of the novel feature of construction hereinafter described,pointcd out in the claims, and shown in the accompanying drawings in which:

VFigure 1 is a vertical, diametrical section through the cistern. Fig. 2 is a plan view of the cistern showing a dome supporting ring in place and ready to receiveI the dome. Fig. 8 is a detail perspective View of the dome supporting ring.

In constructing the cistern l form by means of a suitable mold a cement cylinder l having a cement bottom and embedded in said cement is a supply pipe 2, which pipe leads from a force pum'p of any kind, or any other suitable supply source, and discharges upwardly through the bottom of the cistcrn. A discharge pipe 3 also embedded in the cement leads from the bottom et the cistern. An air pipe 4 joins the pipe 2 so that properl air pressure can be maintained. After the cylinder l has been built up to the proper height a ring 5 is placed upon it and this ring is provided at intervals with upwardly eX- tending metal loops 6 and with inwardly extending brackets 7, these brackets projecting` inwardly beyond the inner sides of the cylinder l. A dome S is then placed in position, said dome consisting of metal plates which rest upon the brackets 7, and these plates are riveted together and the joints made air tight by soldering Or in any other desired manner. The entire dome is then covered with a layer Of cement 9, preferably of the Specification of Letters Patent.

1908. Serial No. 450,377.

Patented .Tune 29, 1909.

same thickness as the walls of the cylinder 1, and the ring 5 is completely embedded in said cement as are also the wire loops 6, which loops serve to more lirmly anchor the ring in place. lt is understood Ol course that a sullicient amount of cement is packed on and around the ring G and allowed to set before the dome is placed in position, and also that the mold employed in constructing the cylinder l is taken down and removed belore putting the dome S is position. lith the cistern so constructed the only Openings are those ot' the supply and discharge pipes which Openings are in the bottom of the cistern, and all el the upper' portion of the eistern is absolutely air tight.

That l claim is 1. A. cistern comprising a cement cylinder, a metal ring embedded in the upper portion OlE said cylinder, inwardly extending brackets carried by said ring, a metal dome resting upon said brackets, an air and water supply pipe opening` into said cistern, and a discharge pipe leading therctrmn.

2. An air tight cistern comprising a cement cylinder, a ring carried by the upper end of said cylinder, inwardly extending brackets carried by said ring, a sectional metal dome resting upon said brackets, an outer covering el cement inclosing said ring and dome, means for admitting Water and air under pressure to said cistern, and a discharge pipe leading from the bottom olf the cistern.

3. An air tight cistern consisting ol a cement cylinder having a cement bottom, a ring embedded in the upper end ol said cylinder, inwardly extending brackets carried by said ring, upwardly extending loops carried by the ring, metal plates mounted upon the said brackets, and forming a dome, said plates being secured together, and cement covering inclosing said loops and covering the dome, means lor admitting water and air under pressure to the bottom ol said cistern, and a discharge pipe leading from said bottom.

BERT L. MILLS.

/Vitnesses:

JOHN T. POWERS, ARTHUR B. CRAWFORD. 

